Re: [SPAM:#####] <original-subject>
with the number of "#"s indicating how strongly the tagging is.
(This had happened previously, but the number of "#"s never
exceeded 3.) Also, their list servers are now silently rejecting
my posts, whereas that had never occurred previously. (If I
switch back to using sendmail, then the posts go through to the
mailing lists.)
It looks like Stanford uses Proofpoint:
https://itservices.stanford.edu/service/emailcalendar/email/spam/antispam
And there should be a X-Proofpoint-Spam-Details header that should give
you some information. But a quick Googling suggests to me that Proofpoint
is notoriously stingy on what those things mean.
--Ken
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